Magneto-generator.



W. D. & Jv. R. PENN'INGTON.

MAGNETO GENERATOR.

APPLICATION FILED JAN. zo, 1910.

Patented Aug. 1, 1911.

'UNITED STATES 'PATENT OFFICE.

. 'WILLIAM D. PENNINGTON AND JOHN RAWSON PENNINGTON, OF CHICAGO, ILLINOIS, ASSIGNORS, BY MESNE ASSIGNMENTS, TO DRAPER--LATHAM MAGNETO COMPANY,

OF NEW YORK, lN.',Y.

Specificationof Letters Patent.

M AGNE'ro-GENERATOR.

lApplication led January 20, 1910. Serial No. 539,099.

To all 'whom 'it may concerm- A Beit known that we, WILLIAM D. IEN- NING'roN and JOHN Rawson PENNINGTON, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinols, have invented a. certain :new and useful Improvement in Magneto-Generators,

of which the lfollowing is a full, clear, concise, and exact description, reference being had-to the accompanying drawings, forming a part of this specification. Our invention relates lto magneto genera.- tors, and has for itslobject the provision of an improved generating device, which serves. to generate currentin sufficient quantlty at a given voltage to maintain a spark of a given predetermined length within wide llimits of load; in other words, a generator,

which, even though loaded-beyond the current necessary to establishV the spark, still has `suiiicient capacity to maintain said spa-rk.l

Wewill describe our invention more in detail 'by reference to the accompanying drawing, illustrating the preferred embodiment thereof, in which- Figure l1 is a longitudinal sectional view of our improved magneto generator, and Fig. 2 is a cross-sectional view of the same.

, In the construction illustrated.'we provide 30. a casing l, which has bearings 2, 2, adapted to support rollers 3, upon which the shaft 4 is to run. A shaft 5 projects fromlthe casing, to which a pulley maybe attached for driving the generator. -The shaft 4 has two support-ing devices, 6, 6, against which are fastened a plurality of permanent magnets 7, 7,' which permanent magnets, as will be seen, come together at the said supporting devices, and then curve upwardly and in- 40 wardly to form what might be called a con.-

struction similar in form to the letter C. The permanent magnets .are so arranged that their faces are adjacent to a plurality of cores 8, whichare mounted upon an annular ring 9, fastened to the casing 1, and extending around the inner periphery thereof. Bolts 10 serve to hold this ring in place. Suitable means can be also provided to hold the permanent magnet in place, these means having been omitted for the sake of clearness.

Each core 8, as will be apparent-` hasA its two extremities upon opposite sides of the .opposite ends of thecores have opposite polarities, due to their proximity to the magnets, whose .polarity is as given on the drawing, the left hand l'end of the core being of south polarity and the right hand end of the core being of north polarity. These polari-' ties are reversed in the next adjacent core,

.as indicated more clearly by the letters N andff S appearing on the figure.

From this construction it will be .seen that the coils, which are stationarily, mounted,

are subject to dissimilar polarities of magnetism,under. the nuence of the permanent magnets 7 and thus the change of the magnetism to the revolving'member causes the generator of electro-motor 'force in the coil, Vwhich electro-motor force is of suflicient size to establish the desired spark. On'- account of the considerable capacity of the generating coils, a sufficient -quantity of current is genera-ted by the machine to maintain the desired spark, even though the machine may be overloaded.

lVVhile-We lhave herein shown and particu- Patented Aug. 1, 1911.

larly described the preferred embodiment of rour invention, we do not limit ourselves to the precise' construction and arrangement as herein set forth, but

Having thus described our invention, what we 'claim as new and desire to secure by Tietters Patent is:

1. A magneto generator having a plurality of C-shaped permanent magnets, a plura-lity of metallic cores arrangedA bet-Ween the converging faces of said permanent magnets. said magnets and core being arranged Vfor relative rotation and a plurality of coils provided upon each core.

2. A magneto generator having aplurality .of radially arranged C-shaped permanent magnets, a shaft upon 'which said magnets are mounted, a plurality of cores fixedly secured in such manner as to substantially periodically close the 4air gaps across sald permanent magnets, and coils mounted on .00pm of this patent may be obtained for said cores, said cores being arranged between the opposite pole faces of said permanent magnets. 3j. A magneto .generator having a plurality of 'radially arranged C-shaped permanent magnets, a plurality of metallic cores arranged between the converging faces of said permanent ma nets, said magnets being arranged for relative rotation with respect t0 said cores and a plurality of coils provided upon each core.

4. A device of theclass specified, comprising an annular series of generating coils and a rotary member carrying a series of permanent magnets having their ends bent to point inwardly toward said coils and their end faces arranged in proximity to the ends of said coils.

5. A device of the class specified, comprising a casing provided with an annular ring carrying generating coils, and a rotary shaft carrying, a series of permanent magnets bent so as to have their ends point inwardly toward said coils, and their end faces in proximity to the ends of said coils.

' 6. A device of the class specied, comprising a casing provided with a ring carrying generating coils, one series of coils being mounted on each side of the ring, a rotary shaft mounted in said casing and a series of C-shaped permanent magnets 7, having the middle of their body portions mounted upon Said shaft and having their ends extending inwardly toward the ends of said coils and in proximity thereto.

In witness whereof, We hereunto subscribe our names this 3d day of December, A. D.,'

WILLIAM D. PENN INGTON. JOHN RAWSON PENNINGTON.

Witnesses:

A. MILLER BELFIELD, J. ELLIOTT.

ve cents each, by addroning' the Commissioner of Patents. Washington, I). 0." 

